I think it should be expected if you are a female and going some place crowded to get some unwanted attention or get "bumped" into.
Balony. And don't give me that "I mean bump shoulders' nonsense. Thta is disqualified with your "unwanted attention". No one should expect unwanted attention, especially at an organized event
Organizers really can't police everyone.
They are expected to hold an event that is safe for everyone to attend. So yes, they should be policing and taking care of situations like these. And they should have policies in place that deal immediately with people who violate the law.
But as long as you have someone there with you to discourage most of that, things should be fine.
What is this? Some back-world caveman practice? That's not to say if my wife and kids were being harassed I wouldn't step in. I would. But I'd then be quite pissed that I had to take care of it instead of the folks running the show.
Fortunately, my experiences at cons have all been positive. The guests have been nice, and the con-goers have been very kind to my family. They have been wonderful celebrations of diversity.